linux-kernel - [PATCH v4 05/10] dt-bindings: i3c: Add macros to help fill I3C/I2C device's reg property

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Message-Id: <20180330074751.25987-6-boris.brezillon@bootlin.com>
Date:   Fri, 30 Mar 2018 09:47:46 +0200
From:   Boris Brezillon <boris.brezillon@...tlin.com>
To:     Wolfram Sang <wsa@...-dreams.de>, linux-i2c@...r.kernel.org,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>
Cc:     Przemyslaw Sroka <psroka@...ence.com>,
        Arkadiusz Golec <agolec@...ence.com>,
        Alan Douglas <adouglas@...ence.com>,
        Bartosz Folta <bfolta@...ence.com>,
        Damian Kos <dkos@...ence.com>,
        Alicja Jurasik-Urbaniak <alicja@...ence.com>,
        Cyprian Wronka <cwronka@...ence.com>,
        Suresh Punnoose <sureshp@...ence.com>,
        Rafal Ciepiela <rafalc@...ence.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        Nishanth Menon <nm@...com>, Rob Herring <robh+dt@...nel.org>,
        Pawel Moll <pawel.moll@....com>,
        Mark Rutland <mark.rutland@....com>,
        Ian Campbell <ijc+devicetree@...lion.org.uk>,
        Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Vitor Soares <Vitor.Soares@...opsys.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Xiang Lin <Xiang.Lin@...aptics.com>,
        linux-gpio@...r.kernel.org,
        Boris Brezillon <boris.brezillon@...tlin.com>
Subject: [PATCH v4 05/10] dt-bindings: i3c: Add macros to help fill I3C/I2C device's reg property

The reg property of devices connected to an I3C bus have 3 cells, and
filling them manually is not trivial. Provides macros to help doing
that.

Signed-off-by: Boris Brezillon <boris.brezillon@...tlin.com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
 include/dt-bindings/i3c/i3c.h | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 include/dt-bindings/i3c/i3c.h

diff --git a/include/dt-bindings/i3c/i3c.h b/include/dt-bindings/i3c/i3c.h
new file mode 100644
index 000000000000..97448c546649
--- /dev/null
+++ b/include/dt-bindings/i3c/i3c.h
@@ -0,0 +1,28 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2017 Cadence Design Systems Inc.
+ *
+ * Author: Boris Brezillon <boris.brezillon@...tlin.com>
+ */
+
+#ifndef _DT_BINDINGS_I3C_I3C_H
+#define _DT_BINDINGS_I3C_I3C_H
+
+#define IS_I2C_DEV		0x80000000
+
+#define I2C_DEV(addr, lvr)					\
+	(addr) (IS_I2C_DEV | (lvr)) 0x0
+
+#define I3C_PID(manufid, partid, instid, extrainfo)		\
+	((manufid) << 1)					\
+	(((partid) << 16) | ((instid) << 12) | (extrainfo))
+
+#define I3C_DEV_WITH_STATIC_ADDR(addr, manufid, partid,		\
+				 instid, extrainfo)		\
+	(addr) I3C_PID(manufid, partid, instid, extrainfo)
+
+#define I3C_DEV(manufid, partid, instid, extrainfo)		\
+	I3C_DEV_WITH_STATIC_ADDR(0x0, manufid, partid,		\
+				 instid, extrainfo)
+
+#endif
-- 
2.14.1